Home / 12,726.12-17,564.40-7,948.20

Finding the Fourth Proportional to 12,726.12, 17,564.40 and 7,948.20

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Solution

The fourth proportional to 12,726.12, 17,564.40 and 7,948.20 is: 10,969.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,726.12 : 17,564.40 = 7,948.20 : x
  2. Step 2: Convert to fraction form
    12,726.12/17,564.40 = 7,948.20/x
  3. Step 3: Cross multiply
    12,726.12x = 17,564.40 × 7,948.20
  4. Step 4: Simplify right side
    12,726.12x = 139,605,364.08
  5. Step 5: Solve for x
    x = 139,605,364.08/12,726.12
  6. Step 6: Final answer
    x = 10,969.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.